Across
- 2. damage caused to water, air, etc. by harmful substances or waste
- 4. the mixture of gases that surrounds the earth and that we breathe
Down
- 1. something that lives and moves but is not a human, bird, fish, or insect
- 2. a living thing that grows in earth, in water, or on other plants.
- 3. a tall plant that has a wooden trunk and branches that grow from its upper part